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The War on Demand

January 24, 2011 4:04 pmJanuary 24, 2011 4:04 pm

Something really strange has happened to the debate over economic policy in the face of the Great Recession and its aftermath — or maybe the real point is that events have revealed the true nature of the debate, stripping away some of the illusions. It’s a bigger story than any one point of dispute — say, over the size of the multiplier, or the effects of quantitative easing — might suggest. Basically, in the face of what I would have said is obviously a massive shortfall of aggregate demand, we’re seeing on all-out attack on the very notion that the demand side matters.

This isn’t entirely new, of course. Real business cycle theory has been a powerful force within academic economics for three decades. But my sense is that the RBC guys had very little impact on public or policy discussion, simply because what they said seemed (and was) so disconnected from actual experience.

Now, however, we’re seeing a much more widespread attack on demand-side economics. More than that, it’s becoming clear that many people don’t so much disagree with the idea that demand matters as find it abhorrent, incomprehensible, or both. I fairly often get comments to the effect that I can’t possibly believe what I’m saying about monetary or fiscal policy, that no sensible person could believe that printing money or engaging in deficit spending will increase output and employment — never mind that all I’m saying is what Econ 101 textbooks have been saying for the last 62 years.

So what’s going on here?

First, Keynes was right: Say’s Law — the notion that income must be spent, and hence that supply creates its own demand — really is at the heart of the issue. Many, many people just can’t see how it’s possible for there to be an overall shortfall of demand. The reason I’ve always loved the baby-sitting coop story is that it’s a human-scale example of how demand shortfalls are possible. But my experience is that if you try telling that story to someone convinced that demand can’t ever be a problem, it just bounces off: the minute you finish, they’re back to saying that income must be spent on something, so a shortage of demand can never happen, and any rise in one person’s spending must lead to an equal fall in someone else’s spending.

Second, the reasons so many people find the notion of inadequate demand abhorrent are, in part, bound up with notions of morality. I’ve been writing a bit about monetary morality in the context of inflation and the gold standard; but this goes deeper than policy. It’s becoming clear to me that a substantial number of writers on economics find the whole idea that the economy can suffer because people are too thrifty, insufficiently willing to spend, deeply repugnant. I’m the sort of person who finds the notion that sometimes virtue is vice and prudence folly interesting; but it’s clear that a number of people find that notion just plain evil. The world shouldn’t be like that — and therefore it isn’t.

Third, monetarists — old-style Friedman-type monetarists who focus on monetary aggregates, or the new style which says that the Fed can and should target nominal GDP — are, whether they realize it or not, part of the axis of monetary evil as far as the demand-deniers are concerned. They may believe that they can limit the scope of demand-side reasoning, making it a case for technocratic policy at the central bank but no more than that. But from the point of view of those who can’t see how demand can possibly matter, they’re essentially in the same camp as Keynesians. And you know, they are; once you’ve accepted the idea that inadequate demand is the problem, the role of fiscal as opposed to monetary policy is just a technical detail (albeit one of enormous practical importance).

It’s kind of shocking if you think about it. Here we have a huge, hard-won intellectual achievement, one that accounts very well for the world we actually see, and yet it’s being thrown away because it doesn’t go along with ideological preconceptions. Once that sort of thing starts, where does it stop? The next thing you know, the theory of evolution will get the same treatment. Oh, wait.

Seriously, though, this is truly sad — and dangerous. Demand-side understanding, in my view, played a big role in helping us avoid a full replay of the Great Depression; if enough people had shared that understanding, we might have avoided even the minor-league Depression we’re going through. But willful ignorance is on the march — and the odds are that we’ll handle the next crisis very badly.